Optex single-channel, battery-powered infrared barrier, 30 m range.
Power supply: with 3-3.9V lithium batteries: 2x2 D-size 3.6V lithium batteries (e.g.: LS H20), or in 2 CRH-5 battery packs with 2x8 CR123A 3V lithium batteries.
CRH-5 battery packs and batteries are not included.
